Optical Microscope

2 cases · 4 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: Modified Detail focus: Sampling and Analysis clear all

Optical Microscope — sub-branches

As polished micrography 1 Kalling Etched Micrography by OM 2 Nital Etched Micrography by OM 1

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Aged microstructure of the HP stainless steel, modified with 1%Nb, cast fitting, tubular, operating for 6 years in a furnace which design temperature is 1100°C. The material presented a network of primary carbides, white and grey, and an austenitic matrix with coalescing secondary precipitation. Some voids. The Vickers identation indicates a hardness value about 260HV 100g in the aged austenitic matrix.

491

ML00173 / May.2021

Welding Cracks in an Aged HP Cast Fitting

M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding

Cm - Kalling Etched Micrography by OMDf - Microhardness identations

The micrography in the longitudinal section in the middle of the thickness shows a light banding. Quenched and tempered structure.

346

ML00037 / Jun.2017

LAS Forging for Pump Body

M - Low Alloy Medium Carbon QTP - Heat Treated PartAp - O&G Well DrillingCd - Typical manufacturing

Cm - Nital Etched Micrography by OMDf - Longitudinal Section

More from these cases

ML00173 — Welding Cracks in an Aged HP Cast FittingM - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding

37

ML00173 / May.2021

Welding Cracks in an Aged HP Cast Fitting

M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding

Cm - Kalling Etched Micrography by OMDf - Base Metal

23

ML00173 / May.2021

Welding Cracks in an Aged HP Cast Fitting

M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding

Cm - As polished micrographyDf - Fusion Line